11109118831 has 2 divisors, whose sum is σ = 11109118832. Its totient is φ = 11109118830.

The previous prime is 11109118819. The next prime is 11109118837. The reversal of 11109118831 is 13881190111.

It is a strong prime.

It is an emirp because it is prime and its reverse (13881190111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11109118831 is a prime.

It is a super-2 number, since 2×11109118831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11109118837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5554559415 + 5554559416.

It is an arithmetic number, because the mean of its divisors is an integer number (5554559416).

Almost surely, 2^11109118831 is an apocalyptic number.

11109118831 is a deficient number, since it is larger than the sum of its proper divisors (1).

11109118831 is an equidigital number, since it uses as much as digits as its factorization.

11109118831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 34.

The spelling of 11109118831 in words is "eleven billion, one hundred nine million, one hundred eighteen thousand, eight hundred thirty-one".